[MITgcm-support] open boundary

Riema Rachmayani imoth_22 at yahoo.com
Sun Nov 5 22:07:50 EST 2006


dear MITgcm,
thank you martin for your answer...
so when i'd like to put elevation as boundary condition (eta=A cos omega t) or elevation from ORITIDE i have to modify, but not in obcs_calc.F??
i have next question...
does MITgcm utilize mode splitting technique (external mode and internal mode) like POM? 
it's not the same like in cg2d.F and cg3d.F??? those subroutine explained about Two-dimensional grid problem conjugate-gradient inverter (with preconditioner) and Three-dimensional grid problem conjugate-gradient inverter (with preconditioner) not about mode splitting technique??

thanks,
regards, 
rima



----- Original Message ----
From: "mitgcm-support-request at mitgcm.org" <mitgcm-support-request at mitgcm.org>
To: mitgcm-support at mitgcm.org
Sent: Saturday, November 4, 2006 12:00:06 AM
Subject: MITgcm-support Digest, Vol 41, Issue 4


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Today's Topics:

   1. external forcing (Riema Rachmayani)
   2. Re: external forcing (Martin Losch)


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Message: 1
Date: Thu, 2 Nov 2006 22:05:15 -0800 (PST)
From: Riema Rachmayani <imoth_22 at yahoo.com>
Subject: [MITgcm-support] external forcing
To: mitgcm-support at mitgcm.org
Message-ID: <20061103060516.94431.qmail at web53805.mail.yahoo.com>
Content-Type: text/plain; charset="us-ascii"

dear MITgcm,

in verification of internal wave, ridges driven by large amplitude barotropic tidal currents imposed through open boundary conditions right?? its mean one of external force which is utilized is sea surface (elevation) at open boundary?? where MITgcm describe it?? i have seen external_forcing.F, but there was no elevation mentioned there....

thank you,
regards,
rima

----- Original Message ----
From: "mitgcm-support-request at mitgcm.org" <mitgcm-support-request at mitgcm.org>
To: mitgcm-support at mitgcm.org
Sent: Friday, November 3, 2006 12:00:07 AM
Subject: MITgcm-support Digest, Vol 41, Issue 3


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Today's Topics:

   1. units of [U,V,W]THMASS (Dimitris Menemenlis)
   2. Re: units of [U,V,W]THMASS (Jean-Michel Campin)
   3. Re: units of [U,V,W]THMASS (Dimitris Menemenlis)
   4. evaporation fields:  supply or estimate? (Jill N Schwarz)


----------------------------------------------------------------------

Message: 1
Date: Wed, 01 Nov 2006 17:11:58 -0800
From: Dimitris Menemenlis <menemenlis at sbcglobal.net>
Subject: [MITgcm-support] units of [U,V,W]THMASS
To: MITgcm Support <mitgcm-support at mitgcm.org>,    Denis Volkov
    <dvolkov at caltech.edu>
Message-ID: <454945DE.6070909 at sbcglobal.net>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed

Are units of [U,V,W]THMASS K*m/s or C*m/s
available_diagnostics.log says K*m/s
but diagnostics_fill_state.F appears to compute C*m/s


------------------------------

Message: 2
Date: Wed, 1 Nov 2006 20:57:22 -0500
From: Jean-Michel Campin <jmc at ocean.mit.edu>
Subject: Re: [MITgcm-support] units of [U,V,W]THMASS
To: mitgcm-support at mitgcm.org
Message-ID: <20061102015722.GA20187 at ocean.mit.edu>
Content-Type: text/plain; charset=us-ascii

Hi Dimitri, 

cut & past from available_diagnostics.log (from an oceanic set-up):
  46 |UTHMASS | 15 |UU   047MR      |degC.m/s        |
  47 |VTHMASS | 15 |VV   046MR      |degC.m/s        |
  48 |WTHMASS | 15 |WM      LR      |degC.m/s        |
  52 |UVELTH  | 15 |UU   053MR      |degC.m/s        |
  53 |VVELTH  | 15 |VV   052MR      |degC.m/s        |
  54 |WVELTH  | 15 |WM      LR      |degC.m/s        |
Could it be that your "available_diagnostics.log" is old ?
or your version of code is old ?

Jean-Michel

On Wed, Nov 01, 2006 at 05:11:58PM -0800, Dimitris Menemenlis wrote:
> Are units of [U,V,W]THMASS K*m/s or C*m/s
> available_diagnostics.log says K*m/s
> but diagnostics_fill_state.F appears to compute C*m/s
> _______________________________________________
> MITgcm-support mailing list
> MITgcm-support at mitgcm.org
> http://mitgcm.org/mailman/listinfo/mitgcm-support


------------------------------

Message: 3
Date: Wed, 01 Nov 2006 18:09:23 -0800
From: Dimitris Menemenlis <menemenlis at sbcglobal.net>
Subject: Re: [MITgcm-support] units of [U,V,W]THMASS
To: mitgcm-support at mitgcm.org
Cc: Denis Volkov <dvolkov at caltech.edu>
Message-ID: <45495353.6020200 at sbcglobal.net>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed

Jean-Michel, thank you for quick reply.
Yes my available_diagnostics.log file was old.
Dimitris

> Hi Dimitri, 
> 
> cut & past from available_diagnostics.log (from an oceanic set-up):
>   46 |UTHMASS | 15 |UU   047MR      |degC.m/s        |
>   47 |VTHMASS | 15 |VV   046MR      |degC.m/s        |
>   48 |WTHMASS | 15 |WM      LR      |degC.m/s        |
>   52 |UVELTH  | 15 |UU   053MR      |degC.m/s        |
>   53 |VVELTH  | 15 |VV   052MR      |degC.m/s        |
>   54 |WVELTH  | 15 |WM      LR      |degC.m/s        |
> Could it be that your "available_diagnostics.log" is old ?
> or your version of code is old ?
> 
> Jean-Michel



------------------------------

Message: 4
Date: Thu, 02 Nov 2006 15:08:32 +0100
From: Jill N Schwarz <jschwarz at awi-bremerhaven.de>
Subject: [MITgcm-support] evaporation fields:  supply or estimate?
To: mitgcm-support at mitgcm.org
Message-ID: <4549FBE0.8020002 at awi-bremerhaven.de>
Content-Type: text/plain; charset=us-ascii; format=flowed

Hi all,
Does anyone have an opinion/recommendation on whether it's better to 
supply reanalysis evaporation fields (along with precip/humid/wind etc 
etc), so that the mitgcm ocean surface temperature is not consistent 
with the evaporation, but the forcing fields are all consistent with 
each other, or to allow mitgcm to calculate the evaporation based on 
external humidity and insolation fields plus it's own ocean surface 
temperature?

Plus, if anyone else is using ERA-40 forcing data (specifically 
evaporation, precipitation and humidity 6 hourly fields) and has a 100% 
sure way of converting their 'metres of water accumulated over the 
period of the forecast' into metres/second, i'd be really grateful to 
hear how it's done- whatever i try i get values 1 or 2 orders of 
magnitude higher than the mitgcm exf_check_range expected ranges recommends.

Cheers,
jill.


------------------------------

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Message: 2
Date: Fri, 3 Nov 2006 09:22:28 +0100
From: Martin Losch <mlosch at awi-bremerhaven.de>
Subject: Re: [MITgcm-support] external forcing
To: mitgcm-support at mitgcm.org
Message-ID: <4F733F6F-CE16-4929-BD17-961D9334C555 at awi-bremerhaven.de>
Content-Type: text/plain; charset=US-ASCII; delsp=yes; format=flowed

Riema,
open boundary conditions are precribed via the obcs (open boundary  
conditions) package. In the internal_wave experiment the main driver  
obcs_calc.F is modified (see the code directory) to hardwire the open  
boundary conditions, (but not for eta/sea surface elevation as far as  
I can see). Alternatively you could create input files with the open  
boundaries (see, e.g. exp4)

Martin

On 3 Nov 2006, at 07:05, Riema Rachmayani wrote:

> dear MITgcm,
>
> in verification of internal wave, ridges driven by large amplitude  
> barotropic tidal currents imposed through open boundary conditions  
> right?? its mean one of external force which is utilized is sea  
> surface (elevation) at open boundary?? where MITgcm describe it?? i  
> have seen external_forcing.F, but there was no elevation mentioned  
> there....
>
> thank you,
> regards,
> rima
> ----- Original Message ----
> From: "mitgcm-support-request at mitgcm.org" <mitgcm-support- 
> request at mitgcm.org>
> To: mitgcm-support at mitgcm.org
> Sent: Friday, November 3, 2006 12:00:07 AM
> Subject: MITgcm-support Digest, Vol 41, Issue 3
>
> Send MITgcm-support mailing list submissions to
>     mitgcm-support at mitgcm.org
>
> To subscribe or unsubscribe via the World Wide Web, visit
>     http://mitgcm.org/mailman/listinfo/mitgcm-support
> or, via email, send a message with subject or body 'help' to
>     mitgcm-support-request at mitgcm.org
>
> You can reach the person managing the list at
>     mitgcm-support-owner at mitgcm.org
>
> When replying, please edit your Subject line so it is more specific
> than "Re: Contents of MITgcm-support digest..."
>
>
> Today's Topics:
>
>    1. units of [U,V,W]THMASS (Dimitris Menemenlis)
>    2. Re: units of [U,V,W]THMASS (Jean-Michel Campin)
>    3. Re: units of [U,V,W]THMASS (Dimitris Menemenlis)
>    4. evaporation fields:  supply or estimate? (Jill N Schwarz)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Wed, 01 Nov 2006 17:11:58 -0800
> From: Dimitris Menemenlis <menemenlis at sbcglobal.net>
> Subject: [MITgcm-support] units of [U,V,W]THMASS
> To: MITgcm Support <mitgcm-support at mitgcm.org>,    Denis Volkov
>     <dvolkov at caltech.edu>
> Message-ID: <454945DE.6070909 at sbcglobal.net>
> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>
> Are units of [U,V,W]THMASS K*m/s or C*m/s
> available_diagnostics.log says K*m/s
> but diagnostics_fill_state.F appears to compute C*m/s
>
>
> ------------------------------
>
> Message: 2
> Date: Wed, 1 Nov 2006 20:57:22 -0500
> From: Jean-Michel Campin <jmc at ocean.mit.edu>
> Subject: Re: [MITgcm-support] units of [U,V,W]THMASS
> To: mitgcm-support at mitgcm.org
> Message-ID: <20061102015722.GA20187 at ocean.mit.edu>
> Content-Type: text/plain; charset=us-ascii
>
> Hi Dimitri,
>
> cut & past from available_diagnostics.log (from an oceanic set-up):
>   46 |UTHMASS | 15 |UU   047MR      |degC.m/s        |
>   47 |VTHMASS | 15 |VV   046MR      |degC.m/s        |
>   48 |WTHMASS | 15 |WM      LR      |degC.m/s        |
>   52 |UVELTH  | 15 |UU   053MR      |degC.m/s        |
>   53 |VVELTH  | 15 |VV   052MR      |degC.m/s        |
>   54 |WVELTH  | 15 |WM      LR      |degC.m/s        |
> Could it be that your "available_diagnostics.log" is old ?
> or your version of code is old ?
>
> Jean-Michel
>
> On Wed, Nov 01, 2006 at 05:11:58PM -0800, Dimitris Menemenlis wrote:
> > Are units of [U,V,W]THMASS K*m/s or C*m/s
> > available_diagnostics.log says K*m/s
> > but diagnostics_fill_state.F appears to compute C*m/s
> > _______________________________________________
> > MITgcm-support mailing list
> > MITgcm-support at mitgcm.org
> > http://mitgcm.org/mailman/listinfo/mitgcm-support
>
>
> ------------------------------
>
> Message: 3
> Date: Wed, 01 Nov 2006 18:09:23 -0800
> From: Dimitris Menemenlis <menemenlis at sbcglobal.net>
> Subject: Re: [MITgcm-support] units of [U,V,W]THMASS
> To: mitgcm-support at mitgcm.org
> Cc: Denis Volkov <dvolkov at caltech.edu>
> Message-ID: <45495353.6020200 at sbcglobal.net>
> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>
> Jean-Michel, thank you for quick reply.
> Yes my available_diagnostics.log file was old.
> Dimitris
>
> > Hi Dimitri,
> >
> > cut & past from available_diagnostics.log (from an oceanic set-up):
> >   46 |UTHMASS | 15 |UU   047MR      |degC.m/s        |
> >   47 |VTHMASS | 15 |VV   046MR      |degC.m/s        |
> >   48 |WTHMASS | 15 |WM      LR      |degC.m/s        |
> >   52 |UVELTH  | 15 |UU   053MR      |degC.m/s        |
> >   53 |VVELTH  | 15 |VV   052MR      |degC.m/s        |
> >   54 |WVELTH  | 15 |WM      LR      |degC.m/s        |
> > Could it be that your "available_diagnostics.log" is old ?
> > or your version of code is old ?
> >
> > Jean-Michel
>
>
>
> ------------------------------
>
> Message: 4
> Date: Thu, 02 Nov 2006 15:08:32 +0100
> From: Jill N Schwarz <jschwarz at awi-bremerhaven.de>
> Subject: [MITgcm-support] evaporation fields:  supply or estimate?
> To: mitgcm-support at mitgcm.org
> Message-ID: <4549FBE0.8020002 at awi-bremerhaven.de>
> Content-Type: text/plain; charset=us-ascii; format=flowed
>
> Hi all,
> Does anyone have an opinion/recommendation on whether it's better to
> supply reanalysis evaporation fields (along with precip/humid/wind etc
> etc), so that the mitgcm ocean surface temperature is not consistent
> with the evaporation, but the forcing fields are all consistent with
> each other, or to allow mitgcm to calculate the evaporation based on
> external humidity and insolation fields plus it's own ocean surface
> temperature?
>
> Plus, if anyone else is using ERA-40 forcing data (specifically
> evaporation, precipitation and humidity 6 hourly fields) and has a  
> 100%
> sure way of converting their 'metres of water accumulated over the
> period of the forecast' into metres/second, i'd be really grateful to
> hear how it's done- whatever i try i get values 1 or 2 orders of
> magnitude higher than the mitgcm exf_check_range expected ranges  
> recommends.
>
> Cheers,
> jill.
>
>
> ------------------------------
>
> _______________________________________________
> MITgcm-support mailing list
> MITgcm-support at mitgcm.org
> http://mitgcm.org/mailman/listinfo/mitgcm-support
>
>
> End of MITgcm-support Digest, Vol 41, Issue 3
> *********************************************
>
>
> Send instant messages to your online friends http:// 
> uk.messenger.yahoo.com
> _______________________________________________
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------------------------------

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